Adduct of b-trichloroborazole and perchloric acid



United States Patent 3,180,701 ADDUCT 0F B-TRICHLOROBORAZOLE AND PERCHLORIC ACID Roy J. Laran, Baton Rouge, La., assignor to Ethyl Corporation, New York, N.Y., a corporation of Virginia No Drawing. Filed Feb. 26, 1962, Ser. No. 176,866 1 Claim. (Cl. 23- 14) A novel and useful chemical, B-trichloroborazole trihydrogen perchlorate, is provided by this invention.

It is made by reacting anhydrous perchloric acid with B-trichloroborazole (the chlorines are attached to the boron atoms) at low temperatures (e.g. 75 to 25 C). For example, an excess of anhydrous perchloric acid [see I. Am. Chem. Soc. 75, 184 (1953)] was contacted with B-trichloroborazole [see J. Chem. Soc. 1959, 1306-7] under essentially anhydrous conditions While keeping the system at about -10 C. The reactants were used in a mole ratio of at least about 6: 1, respectively. After several hours of contact time, the excess acid was removed by evacuation. The B-trichloroborazole trihydrogen perchloratewas a tan powdery substance which on analysis for N, C10 Cl, and B showed that these components were in the mole ratio of 1:1:1:1. The infrared spectrum indicated a high perchlorate content (approximately theoretical), a highly hindered OH radical (hydrogen bonding with the C10 radical), and that the borazole ring was intact. The reaction was:

3,180,701 Patented Apr. 27, 1965 "ice This indicates that addition takes place to form an HCIO, adduct with the free. electron pair of the N atom. Analytical data to support the above mole ratio and reaction equation are:

Calcd.: N, 8.66; C10 61.5; C1, 21.9; B, 6.68. Found: N, 8.20; ClO 61.7; C1, 20.4; B, 6.70.

Temperature is an important feature of the above process. When attempting to carry out the above procedure at C., only an amber-colored polymer-like material was produced.

Anhydrous B-trichloroborazole trihydrogen perchlorate is sensitive to sharp physical shock. However, it has been heated to temperatures as high as 50 C. without exploding. Hence this chemical is useful as an explosive for use in percussion caps and other percussive detonation devices.

What is claimed is:

Anhydrous B-trichloroborazole trihydrogen perchlorate, having the formula B N H CI 3HCIO References Cited by the Examiner UNITED STATES PATENTS 2,917,543 12/53 Smalley et a1. 23--14 2,951,867 9/60 Stafiej et a1. 23-14 MAURICE A. BRINDISI, Primary Examiner.

CARL D. QUARFORTH, Examiner. 

